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Olympics Day 15 - Athletics

Gold medalist Mohamed Farah of Great Britain celebrates on the podium during the medal ceremony for the Men's 5000m on Day 15 of the London 2012 Olympic Games at Olympic Stadium on August 11, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)

Olympics Quiz: 12 questions from the '12 Games

As the 2012 London Games come to an end, we thought some expert Olympic fans might want to test their knowledge with a little quiz. -- By Chris Wilson, Yahoo! Sports